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. 2018 Sep 12;13(9):e0203673. doi: 10.1371/journal.pone.0203673

Fig 13. Density for evidence of alluvial gold exploitation in Colombia in 2016, as published by [84].

Fig 13

Three categories are included: Low (less 1 habitant per square kilometer), Medium (between 1.1 and 5 habitants per square kilometer) and High (more than 5 habitants per square kilometer). Evidence of intense mining activities was observed in the lower Cauca and Magdalena Basins, and the the Central Pacific region. Scattered mining activities were observed in the Southern Pacific, some parts of the Eastern Plains.